The newer vehicles had the cold air snorkel for the engine. If you run all air through the rad on the older cars wouldn't that be pretty hot air for the engine. Especially in summer. No?
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'68 Parisienne 2+2 Convertible Matador Red (Resale Red but not for sale).
Every modern car has it, even my 73 LeMans is covered. Must be something to it.
My "modern" 63 has these from factory.
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63 Parisienne sport coupe (The Big GTO), black, maroon interior, 409 4 speed; former owner of a 59 El Camino, 63 Corvette SWC, 62 Chev Bel Air SC. 1963- Pontiac top selling car in Canada
Mahone Bay, NS Still not old enough to need an automatic